webpack.config.js

const path = require('path')
const VueLoaderPlugin = require('vue-loader/lib/plugin')
const HTMLPlugin = require('html-webpack-plugin')
const webpack = require('webpack')
const MiniCssExtractPlugin = require('mini-css-extract-plugin')

const isDev = process.env.NODE_ENV === 'development'

const config = {
    target: 'web',
    entry: path.join(__dirname, './src/index.js'),
    output: {
        filename: 'bundle.[hash:8].js',
        path: path.join(__dirname, 'dist')
    },

    module: {
        rules: [{
            test: /\.vue$/,
            loader: 'vue-loader'
        },
        {
            test: /\.jsx$/,
            loader: 'babel-loader'
        }, {
            test: /\.(gif|jpg|jpeg|png|svg)$/,
            use: [{
                loader: 'url-loader',
                options: {
                    limlt: 1024,
                    name: '[name].ext'
                }
            }]
        }]
    },
    plugins: [
        new VueLoaderPlugin(),
        new webpack.DefinePlugin({
            'process.env': {
                NODE_ENV: isDev ? '"develoment"' : '"production"'
            }
        }),
        new HTMLPlugin()
    ]
}

if (isDev) {
    config.module.rules.push({
        test: /\.less/,
        use: [
            'style-loader',
            'css-loader', {
                loader: 'postcss-loader',
                options: {
                    sourceMap: true
                }
            },
            'less-loader'
        ]
    })
    config.devtool = '#cheap-module-eval-source-map'
    config.devServer = {
        port: 8080,
        host: '0.0.0.0',
        overlay: {
            errors: true
        },
        hot: true
    }
    config.plugins.push(
        new webpack.HotModuleReplacementPlugin(),
        new webpack.NoEmitOnErrorsPlugin()
    )
} else {
    config.entry = {
        app: path.join(__dirname, './src/index.js'),
        vendor: ["vue"]
    }
    config.output.filename = '[name].[chunkhash:8].js'
    config.module.rules.push(
        {
            test: /\.less$/,
            use: [
                MiniCssExtractPlugin.loader,
                'css-loader',
                'less-loader'
            ]
        }
    )

    config.plugins.push(
        new MiniCssExtractPlugin({
            filename: "styles.[contentHash:8].css",
            // chunkFilename: "styles.[contentHash:8].css"
        })
    )
    config.optimization = {
        splitChunks: {
            cacheGroups: {
                commons: {
                    name: "commons",
                    chunks: "initial",
                    minChunks: 2
                }
            }
        }
    }
}

module.exports = config